<template>
    <div class="login_container">
        <div class="login_box">
            <!-- 头部区域 -->
            <div class="avatar_box">
                <img src="../assets/logo.png" alt="">
            </div>
            <!-- 登陆表单区域 -->
            <el-form ref="loginFormRef"  label-width='0px' :model='loginForm' :rules='loginFormRules' class="login_form">
                <!-- 登陆用户名 -->
                <el-form-item prop="username">
                    <el-input prefix-icon="iconfont icon-user" v-model="loginForm.username"></el-input>
                </el-form-item>
                <!-- 登陆密码 -->
                <el-form-item prop="password">
                    <el-input prefix-icon="iconfont icon-3702mima" v-model="loginForm.password" type="password"></el-input>
                </el-form-item>
                <!-- 按钮区域 -->
                <el-form-item class="btns">
                    <el-button type="primary" @click="login">登陆</el-button>
                    <el-button type="info" @click="loginFormRef">重置</el-button>
                </el-form-item>
            </el-form>
        </div>
    </div>
</template>
<script>
export default {
    data(){
        return {
            // 这是登陆表单的数据绑定对象
           loginForm:{
                username:'admin',
                password:'123456',
            },
            //  这是登陆表单验证
            loginFormRules:{
                //用户名验证
                username:[
                    { required: true, message: '请输入用户名称', trigger: 'blur' },
                    { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
                ],
                //密码验证
                password:[
                    { required: true, message: '请输入登陆密码', trigger: 'blur' },
                    { min: 3, max: 15, message: '长度在 3 到 15 个字符', trigger: 'blur'}
                ]
            }
        }
    },
    methods:{
        loginFormRef(){
           this.$refs.loginFormRef.resetFields()
        },
        login(){  
            this.$refs.loginFormRef.validate(async valid=>{
                if(!valid) return;
                // 获取数据库数据并做出响应 
                const {data:res} = await this.$http.post("login",this.loginForm) 
                if(res.meta.status!=200) return this.$message.error("登陆失败");
                this.$message.success("登陆成功");
                console.log(res);
                //携带token放入到session storage里面
                window.sessionStorage.setItem("token",res.data.token);
                //链式编程导航
                this.$router.push("home")
            })
        }
    }
}
</script> 
<style lang="less" scoped>
    .login_container{
        background-color: #2b4b6b;
        height: 100%;
    }
    .login_box{
        width: 450px;
        height: 300px;
        background-color: #fff;
        border-radius:3px;
        position:absolute;
        left:50%;
        top:50%;
        transform:translate(-50%,-50%);
        .avatar_box{
            height: 130px;
            width: 130px;
            border:1px solid #eee;
            border-radius:50%;
            padding: 10px;
            box-shadow:0 0 10px #ddd;
            position:absolute;
            left:50%;
            transform: translate(-50%,-50%);
            background:#fff;
           img{
               width: 100%;
               height: 100%;
               border-radius:50%;
               background-color: #eee;
           }
        }
    }
    .login_form{
        width: 100%;
        padding:0 20px;
        position:absolute;
        bottom:0px;
        box-sizing:border-box;
    }
    .btns{
        display:flex;
        justify-content:flex-end;
    }
</style>